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厂家揭示冷拔无缝钢管制作流程工艺

2018-12-05 14:05:48 无锡科达脚手架厂 阅读

按生产方法不同可分为热轧管、冷轧管、冷拔管、挤压管等。冷拔无缝钢管一般在自动轧管机组上生产。实心管坯经检查并清除表面缺陷,截成所需长度,在管坯穿孔端端面上定心,然后送往加热炉加热,在穿孔机上穿孔。在穿孔同时不断旋转和前进,在轧辊和顶头的作用下,管坯内部逐渐形成空腔,称毛管。再送至自动轧管机上继续轧制。最后经均整机均整壁厚,经定径机定径,达到规格要求。利用连续式轧管机组生产冷拔无缝钢管是较先进的方法。

According to different production methods, it can be divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe and so on. Cold-drawn seamless steel pipes are generally produced on automatic pipe rolling mills. The solid billet is checked and cleared of surface defects, cut into the required length, centered on the end face of the billet perforation, then sent to the heating furnace for heating, and perforated on the perforator. Under the action of the roll and the top, a cavity is gradually formed inside the billet, which is called capillary. It is then sent to the automatic pipe mill to continue rolling. Finally, the wall thickness of the whole machine is equalized, and the sizing machine is used to calibrate the diameter, which meets the requirements of specifications. It is an advanced method to produce hot-rolled seamless steel pipe by continuous pipe rolling mill. 2若欲获得尺寸更小和质量更好的冷拔无缝钢管,必须采用冷轧、冷拔或者两者联合的方法。冷轧通常在二辊式轧机上进行,钢管在变断面圆孔槽和不动的锥形顶头所组成的环形孔型中轧制。冷拔通常在0.5~100T的单链式或双链式冷拔机上进行。

If we want to obtain cold-drawn seamless steel tubes with smaller size and better quality, we must adopt cold-rolling, cold-drawing or combination of the two methods. Cold rolling is usually carried out on a two-roll mill. Steel tubes are rolled in an annular pass consisting of a circular groove with variable cross-section and a fixed conical head. Cold drawing is usually carried out on single-chain or double-chain cold-drawing machines of 0.5-100T.

3挤压法即将加热好的管坯放在密闭的挤压圆筒内,穿孔棒与挤压杆一起运动,使挤压件从较小的模孔中挤出。此法可生产直径较小的钢管

The extrusion method is to place the heated tube blank in a closed extrusion cylinder, and the perforating rod moves with the extrusion rod to extrude the extruded part from a smaller die hole. This method can produce steel pipes with smaller diameter.



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